Add libbox wrapper

cmd/internal/build/main.go

@@ -4,11 +4,12 @@ import (
 	"os"
 	"os/exec"
 
+	"github.com/sagernet/sing-box/cmd/internal/build_shared"
 	"github.com/sagernet/sing-box/log"
 )
 
 func main() {
-	findSDK()
+	build_shared.FindSDK()
 
 	command := exec.Command(os.Args[1], os.Args[2:]...)
 	command.Stdout = os.Stdout

cmd/internal/build_libbox/main.go

@@ -0,0 +1,61 @@
+package main
+
+import (
+	"flag"
+	"os"
+	"os/exec"
+	"path/filepath"
+
+	_ "github.com/sagernet/gomobile/asset"
+	"github.com/sagernet/sing-box/cmd/internal/build_shared"
+	"github.com/sagernet/sing-box/log"
+	"github.com/sagernet/sing/common/rw"
+)
+
+var debugEnabled bool
+
+func init() {
+	flag.BoolVar(&debugEnabled, "debug", false, "enable debug")
+}
+
+func main() {
+	build_shared.FindSDK()
+	build_shared.FindMobile()
+
+	args := []string{
+		"bind",
+		"-v",
+		"-androidapi", "21",
+		"-javapkg=io.nekohasekai",
+		"-libname=box",
+	}
+	if !debugEnabled {
+		args = append(args,
+			"-trimpath", "-ldflags=-s -w -buildid=",
+			"-tags", "with_gvisor,with_quic,with_wireguard,with_utls,with_clash_api,debug",
+		)
+	} else {
+		args = append(args, "-tags", "with_gvisor,with_quic,with_wireguard,with_utls,with_clash_api")
+	}
+
+	args = append(args, "./experimental/libbox")
+
+	command := exec.Command(build_shared.GoBinPath+"/gomobile", args...)
+	command.Stdout = os.Stdout
+	command.Stderr = os.Stderr
+	err := command.Run()
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	const name = "libbox.aar"
+	copyPath := filepath.Join("..", "sing-box-for-android", "app", "libs")
+	if rw.FileExists(copyPath) {
+		copyPath, _ = filepath.Abs(copyPath)
+		err = rw.CopyFile(name, filepath.Join(copyPath, name))
+		if err != nil {
+			log.Fatal(err)
+		}
+		log.Info("copied to ", copyPath)
+	}
+}

cmd/internal/build_shared/sdk.go

@@ -1,6 +1,7 @@
-package main
+package build_shared
 
 import (
+	"go/build"
 	"os"
 	"path/filepath"
 	"runtime"
@@ -18,7 +19,7 @@ var (
 	androidNDKPath string
 )
 
-func findSDK() {
+func FindSDK() {
 	searchPath := []string{
 		"$ANDROID_HOME",
 		"$HOME/Android/Sdk",
@@ -79,3 +80,13 @@ func findNDK() bool {
 	}
 	return false
 }
+
+var GoBinPath string
+
+func FindMobile() {
+	goBin := filepath.Join(build.Default.GOPATH, "bin")
+	if !rw.FileExists(goBin + "/" + "gobind") {
+		log.Fatal("missing gomobile installation")
+	}
+	GoBinPath = goBin
+}